Citi announced a social rewards app for Facebook: the Citi ThankYou Point Sharing App.

This new Facebook app makes it quick and easy for ThankYou Rewards members who are Facebook friends to pool their points together, and use their points’ collective value towards a shared goal or reward. ThankYou members on Facebook can combine their points to make a charitable donation, or choose from millions of rewards on www.thankyou.com, from travel to electronics.